package com.mframe.util;

import java.security.MessageDigest;

/**
 * MD5加密工具类
 * @author cuijr
 * 
 */
public class MD5 {
	/**
	 * function: GetMd5 加密函数
	 * remark: 
	 * @param s 传入一个String类型
	 * @return  返回一个加密后的
	 * @throws Exception
	 */
	public static final String GetMd5(String s) throws Exception {
		char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
				'a', 'b', 'c', 'd', 'e', 'f' };
		char str[];
		byte strTemp[] = s.getBytes();
		MessageDigest mdTemp = MessageDigest.getInstance("MD5");
		mdTemp.update(strTemp);
		byte md[] = mdTemp.digest();
		int j = md.length;
		str = new char[j * 2];
		int k = 0;
		for (int i = 0; i < j; i++) {
			byte byte0 = md[i];
			str[k++] = hexDigits[byte0 >>> 4 & 0xf];
			str[k++] = hexDigits[byte0 & 0xf];
		}

		return new String(str);

	}
}
